Ingolf Sack1, Sebastian Hirsch1, Dieter Klatt, Kaspar Josche Streitberger, Florian Freimann2, Christian Sprung2, Jrgen Braun3
1Department of Radiology, Charit University Medicine, Berlin, Germany; 2Department of Neurosurgery, Charit University Medicine; 3Institute of Medical Informatics, Charit University Medicine, Berlin, Germany
The alteration of the viscoelastic properties of brain is a key point in current theories of the pathogenesis of normal pressure hydrocephalus (NPH). MR elastography (MRE) is capable of measuring the mechanical connectivity and micromechanical order of brain tissue in vivo. This paper reports data of 19 NPH-patients studied prior and after shunt operation by cerebral multifrequency MRE and compared to 25 age-matched controls. Conclusion: NPH is associated with disorder and softening of brain tissue. Rehabilitation is seen in re-increasing micromechanical order whereas shear elasticity remains lower than in age-matched controls.